Platen setter



A. A. EGLI PLATE'N- SETTER Filed Jan. 13 1923 Get. 21 1924.

Patented st. 21, 1924:.

STATES PATENT oFFicET.

ARNOLD AUGUST EGLI, 0'1: BERN, SWITZERLAND, ASSIGNOB TO POLYGRAPHISGHE GESELLSCI-IAFT, 0F LA'UPEN-BERN, SWITZERLAND.

PLATEN SETTER.

Application filed January 13, 1923; Serial No. 612,369.

vices or platen stepping devices for print- 1 ing machines, more particularly for machinesv in which the paper With. the platen.

is moved into contact with a line of types that has been previously set for printing. In accordance with the invention the platen is directly or indirectly connected with a ratchet wheel whose steppingpawl is caused to impart more or less rotary movement to the wheel according to the adjustment of an adjustable stop against which i the pawl or a part connected with itabuts.

The ratchet wheel is preferably connected with a worm that engages with a worm wheel arranged on the shaft of the platen.

The relative positions of the worm and the ii worm wheel could, however, be reversed to The pawl is accomplish the same-result. preferably linked to a lever equipped with a roll that strikes against the said adjustable stop. The adjustable stop may be mounted on a curved bar whose curvature corresponds to the curved path described by theplaten. The ratchet is preferably provided with a handle and the worm wheel is arranged in a known manner so asto be detachable from the platen.

The invention is illustrated in the drawing in which Fig. l is a side elevation and Fig. 2 a plan View.

Referring to the drawing a is a platen upon whose shaft a worm wheel I) is arranged that engages with a worm c. The worm c and a ratchet wheel (Z aremounted on a common shaft journalled in a frame or bracket supported by an arm or the like which rotates freely around the platen shaft. A pawl f co-operates with the ratchet wheel (Z. The pawl 7" is pivoted on a lever g equipped with a roll it. The lever g is acted upon by a spring 7 which tends to rotate the lever 9 into contact with a stop 2'. 7c is a curved graduated bar with a slot 10 adapted to receive a screw with a thumb nut n for fixing an adjustable stop on. The

curvature of the curved bar or support for the stop m corresponds to the curve'described bytheplaten when it is rocked into the printing position shown in broken lines in Figs. 1 and 2.

The device operates in the following manner: When the platen is rocked from the normal position into the printing position the arm or lever g, on leaving the adjustable stop m is rotated backwards by the springr until it strikes against the stop 2'. During this backward rotation of the arm g, thattakes place when the platen is rocked forward, the pawl f trails over the teeth of the ratchet wheel cl. When the platen a. is swung back into its normal position-the roll ll. of the army strikes against the stop m and the arm 9 is then rotated away from the stopz' until the pawl 7' reaches its normal position in, which it isfshown in solid lines in Figs. 1 and2. l/Vhen it is thus rotated back from the position'in which it strlkes against the stop 2' into its normal position the arm 9 by means of the pawl 7 turns the ratchet wheel a) and this rotation is trans mitted through-the worm c to the worm wheel d and through this latter to the platen a. a

The worm wheel d is. slipped onto the shaft of the platen a and isa-rranged to be fixed to the same by means of a small handwheel 0. The ratchet wheel is also provided with a handle 10 by means of which the wheel can be turned through any angle for the purpose of adjusting the platen ,ap

Claims: 1. In a printing machine, types, a platen,

a platen'rocker for moving the platen onto the types, a paper feeding device, a ratchet wheel associated withpthe paper feeding device, a pawl for rotating the' ratchet wheel, movement reducing means interposed betweenthe ratchet wheel and the paper feeding device, and 'a stop against which the said pawl abuts. r

. 2. In a printing machine, types, a platen, a platen rocker for moving the'platen onto the types, a paper feeding device, a ratchet wheel associated with the paper feeding device, a pawl for rotating the ratchet wheel, a movement reducing gear interposed between the ratchet wheel and the paper feeding device, and a stop against which the said pawl abuts.

'3. In a printing machine, types, a cylindrical platen, aplaten shaft, a platen. rocker for swinging the platen onto the types, a ratchet wheel associated with tl e platen, a pawl for rotating the ratchet wheel, a wormand a Worm wheel for transmitting the rotationof the ratchet wheel to the platen, and an adjustable'stop against which the said pawl abuts.

4. In a printing machine, types, a cylindrical platen, a platen rocker for swinging the platen onto the types, a ratchet wheel associated with the platen, a pawl for rotating the ratchet wheel, a roll associated with the pawl, and a stop against which the roll abuts.

5. In a printing machine, types, a cylindrical'platen, a platen rocker for swinging the platen onto the types, a ratchet wheel associated with the platen, a pawl for rotating the ratchet wheel,.means for rotating the pawl relatively to the ratchet wheel,

a stop against which the said pawl abuts,

and another stop for limiting the motion of the said pawl.

6. In a printing machine, types, a cylindrical platen, a platen rocker for swinging the platen onto the types, a ratchet wheel associated with the platen, a pawl for rotating the ratchet wheel, means for rotating the pawl relatively to the ratchet'wheel, a stop against which the pawl abuts, and a curved support carrying the said stop.

7. In a printing machine, types, a platen, a platen rocker for moving the platen onto the types, a'paper feeding device, a ratchet wheel associated with the paper feeding de'-.

vice, a pawl for rotating the ratchet wheel, a worm gear interposed between the ratchet wheel and thepaper feeding device, and a.

stop against which the said pawl abuts.

8. In a printing machine, types, a cylindrical platen, a platen shaft,'a platen rocker for swingingtlie'platen onto thetypes, a ratchet wheel associated with the platen, a pawl for rotating theratchet wheel, a worm and. a worm wheel for transmitting the rotation of the ratchet wheel to the platen,

drical platen, a platen rocker for moving the platen onto the types, a paper feeding device, a ratchet wheel associated with the paper feeding device, a pawl for rotating,

the ratchet wheel, a movementreducing means interposed between the ratchet wheel and the paper feeding device, and a stop against which the said pawl abuts.

V 10. In a printing machine, types, a platen, a platen rocker for moving the platen onto the types, a paper feeding device, a ratchet wheel associated with the paper feeding device, a pawl for rotating the ratchet wheel, an adjustable stop against which the pawl abuts, and a movement reducing means interposed between the ratchet wheel .a-nd'the paper feeding device. 7

11. In a printing machine, types, a cylindrical platen, a platen rocker for swinging the platen onto the '-types, a ratchet wheel associated with the platen, a pawl for rotating the ratchet wheel and adapted 'to be moved with the platen, means for rotating the pawl relatively to the ratchetwheel, a first stop against which the said p wl'abuts, and second stop for limiting the motion of the said pawl, when the platen is moved onto the types. 7 p V 12. In a printing machine, types, a platen, a platen rocker for swinging the platen onto the types, a ratchet wheel associated with the platen, a pawl forvrotating the. ratchet wheel, means for rotating the pawl relatively to the ratchet wheel, an adjust able stop against which the said pawl abuts, and a curred support carrying the said stop. 7 Q 1 13. In a printing machine, types, a cylindrica-l platen, a platen shaft, a platen rocker, for swinging the platen onto the types, a ratchet wheel associated with the platen, a pawl for rotating the ratchet wheel, and a pawlcarrier adapted to be swung round the axis of the said :Wheel.

14:. In a printing machine, types, a cy lindrical platen, ,aplaten shaft, a platen rocker for swinging the platen onto-the types, a ratchet wheel associated with-the platen, a pawl for rotating the ratchet wheel, an adjustable stop against which the said pawl abuts, and a spring adapted to move the pawl carrier relatively to the ratchet wheel. r

In testimony whereof I have afiixed'my signature in presence of two witnesses.

ARNOLD AUGUST EGLI.

/Vitnesses:

WERNER Sonanrnn, R. HEINGARTNER.- 

